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#Factorio steam power plant mod#
#Factorio steam power plant mods#

If the only effect the mod has on the game is it changes the total length of one day, without changing the ratio of dusk : day : dawn : night, then the equation can be simplified asĪccumulators / Solar_panels = 0.002016 /s × game_day This equation could also be used to remember the vanilla optimal ratio given its simplicity.

#Factorio steam power plant mods#

If the player uses mods which change the power generation of solar panels, or the energy storage of accumulators, but not the length of days, a simplified version of this equation can be used.Īccumulators / Solar_panels = 70 s × Solar_power / Accumulator_energy Which, given the default time lengths of: day = 12500/60 s dawn or dusk = 5000/60 s night = 2500/60 s, and the default: Solar_power = 60 kW Accumulator_energy = 5 MJ = 5000 kJ, gives the optimal ratio of 0.84 accumulators per solar panel. (day + dawn) × (night + dawn × (day + dawn) / game_day) / game_day In vanilla factorio, without mods which change any of these values, the optimal ratio will be the same. There are also times between day and night called dusk and dawn which complicate the calculations. These include the power generation of a solar panel, the energy storage of an accumulator, the length of a day, and the length of a night. The optimal ratio of accumulators per solar panel relies on many values in the game. This is taken from Accumulator / Solar Panel Ratio (which calculates this in an impressive mathematical way!) and another post in that thread (which calculates the solar panel to megawatt ratio in a different way).Ī small 9x9 setup demonstrating the 20:24 "close enough" ratio above. This means that you need 1.428 MW of production (of solar panels) and 100MJ of storage to provide 1 MW of power over one day-night cycle.Ī "close enough" ratio is 20:24:1 accumulators to solar panels to megawatts required (for example, a factory requiring 10 MW can be approximately entirely powered, day and night, by 200 accumulators and 240 solar panels - this approximation differs from optimal only in that it calls for 20 extra solar panels, which is negligible but remember that the difference between the "close enough" ratio and the optimal ratio increases as you add more solar panels). The optimal ratio is 0.84 (21:25) accumulators per solar panel, and 23.8 solar panels per megawatt required by your factory (this ratio accounts for solar panels needed to charge the accumulators). Previously it counted as Water, with a >100 temperature.A possible setup Solar panels and accumulators Optimal ratio

Steam is the only fluid that cannot be stored in barrels.

Steam is the only non-liquid fluid in Factorio.

The fill meter on steam storage tanks fills from the top instead of from the bottom.

Other than this difference, either steam engines or turbines can be used to generate power off of steam from any source. However, if the temperature of the steam exceeds the maximum temperature of the steam engine or turbine, then the power output is capped at maximum, and the extra energy in the steam is wasted. If the temperature of the steam is lower than the steam engine or turbine can handle, then the power output will be lower than optimal, but no energy will be wasted. (200 Joule / unit / Celsius) * 25000 units * (165☌-15☌) = 750 000 000 joules = 750 MJĪ storage tank holding 25000 units of Steam at 500☌ thus contains 2.425 gigajoules of energy, a surprisingly large amount equal to 485 fully charged accumulators! Steam suffers no thermal losses sitting or flowing through pipes or storage tanks, the energy put into water to create steam is the same amount of energy you get back out from it since both steam engines and turbines are 100% efficient.įor example, a storage tank that holds 25000 units of Steam at 165☌ contains. This higher temperature equates to a higher energy density of the same number of units of steam, meaning: higher temperature, more energy per volume. In all cases, steam produced in boilers is 165☌ and steam from heat exchangers is 500☌. The energy storage of steam is exactly 200 Joule / unit / degree Celsius, so for every degree increase in temperature of a single unit of fluid requires exactly 200 Joules. The amount of energy contained in steam is linearly proportional to its temperature (minus 15☌ ambient temperature).